From: Jonathan Corbet <corbet@lwn.net>
Date: Fri, 16 May 2008 20:25:20 +0000 (-0600)
Subject: usbdev: BKL pushdown
X-Git-Tag: v2.6.27-rc1~1103^2~90
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=b5b4aa67da65aeb58718e0a39158b293873ac572;p=linux-2.6-omap-h63xx.git

usbdev: BKL pushdown

Add explicit lock_kernel() calls to usbdev_open()

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index de17738f3ac..9218cca2104 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -565,6 +565,7 @@ static int usbdev_open(struct inode *inode, struct file *file)
 	struct dev_state *ps;
 	int ret;
 
+	lock_kernel();
 	/* Protect against simultaneous removal or release */
 	mutex_lock(&usbfs_mutex);
 
@@ -611,6 +612,7 @@ static int usbdev_open(struct inode *inode, struct file *file)
 	if (ret)
 		kfree(ps);
 	mutex_unlock(&usbfs_mutex);
+	unlock_kernel();
 	return ret;
 }